#  1 EVENT_NAME
#  2 EVENT_DATE_YYYYMMDD
#  3 EVENT_TIME_HHMMSS
#  4 EVENT_LATITUDE_DEGREE
#  5 EVENT_LONGITUDE_DEGREE
#  6 EVENT_DEPTH
#  7 MAGNITUDE_L
#  8 MAGNITUDE_W
#  9 FOCAL_MECHNISM
# 10 NETWORK
# 11 STATION_CODE
# 12 STATION_NAME
# 13 STATION_LATITUDE_DEGREE
# 14 STATION_LONGITUDE_DEGREE
# 15 STATION_ELEVATION
# 16 LOCATION
# 17 VS30_M/S
# 18 SITE_CLASSIFICATION_EC8
# 19 MORPHOLOGICAL_CLASSIFICATION
# 20 EPICENTRAL_DISTANCE_KM
# 21 EARTHQUAKE_AZIMUTH_DEGREE
# 22 DATA_TIME_FIRST_SAMPLE_YYYYMMDD_HHMMSS
# 23 DATA_TIME_FIRST_SAMPLE_PRECISION
# 24 SAMPLING_INTERVAL_S
# 25 NDATA
# 26 DURATION_S
# 27 STREAM
# 28 UNITS
# 29 INSTRUMENT
# 30 INSTRUMENT_ANALOG/DIGITAL
# 31 INSTRUMENTAL_FREQUENCY_HZ
# 32 INSTRUMENTAL_DUMPING
# 33 FULL_SCALE
# 34 N_BIT_DIGITAL_CONVERTER
# 35 PGA_CM/S^2
# 36 TIME_PGA
# 37 BASELINE_CORRECTION
# 38 FILTER_TYPE
# 39 FILTER_ORDER
# 40 LOW_CUT_FREQUENCY
# 41 HIGH_CUT_FREQUENCY
# 42 LATE/NORMAL TRIGGERED
# 43 DATA_VERSION
# 44 DATA_TYPE
# 45 DATA_TIMESTAMP_YYYYMMDD_HHMMSS
# 46 UNUSED1
# 47 UNUSED2
# 48 USER1
# 49 USER2
# 50 USER3